Got these on ebay; however, I think they are about the same price other places. They are a little hard to install and I had to heat them with a hair dryer to get them to bend to the curve in the ceiling that first time. Not much of a problem. The handle for the vent of course was still yellowed, so I got some white Fusion paint for plastic to fix that. Boy do these make the lights brighter. It was work, but I'm happy I did it. After changing those out, I just had to recover the dark end cap that was cracked. Be careful, once you start upgrading......